GLCD construction-pin description, power pins, control signals, block diagram, translating inputs on the screen; Graphic LCD interfacing. In order to proceed, as of to state the obvious, you need to get the GLCD arduino library from the arduino playground(there is also an. So in this tutorial we will interface KS GLCD with our Starter AVR board which has ATmega 32 micro controller on it. To learn more about this GLCD, visit .
|Published (Last):||15 October 2012|
|PDF File Size:||5.1 Mb|
|ePub File Size:||6.25 Mb|
|Price:||Free* [*Free Regsitration Required]|
Arduino Playground – GLCDks
A graphical LCD is an electronic display unit which can display any type of elements provided by the user. Unlike a character LCD which can only display alphanumeric characters, a graphical LCD can display images, fonts and other structures. In comparison with character LCD, it can display anything on the screen provided by the user. Character LCD only kss0108 the alphanumerical characters.
The user can create images, fonts and other structures and display on them. KS is a dot matrix gglcd controller from Samsung with 64 channel output. To generate timing signals for these two controllers, there is a common driver KS It has 8 data lines, 6 control lines and 6 ylcd and display related pins.
Pin descriptions are given below. We use these pins to transfer the data to the display RAM. Connect these pins to 5V and ground respectively.
KS0108 Graphic LCD Interfacing with PIC18F4550-Part 1
The pin 18 is the output ks018 a negative voltage generator. By using a potentiometer, we can generate the required operating voltage by feeding the negative voltage to the Vo pin. We can vary Vo to change the contrast of the display.
The 19 and 20 pins are Anode and cathode of backlit LED, limit the current through it by putting a resistor in the line. We can use a pot if you need to vary this too. RST is the reset pin, it is used to reset the entire display content by clearing whole of the display RAM.
One of the important ms0108 while clocking is, always give at ks0180 1 microsecond delay after every instruction or data transfer. This parameter will be defined as Ecycle in the datasheet of the module. For JHD, the Ecycle value is 1us. KS is a 64 channel common driver which generates timing signals to control the other two KS segment drivers.
There is also a negative voltage generator which outputs the negative voltage through Vee pin. In some display modules, this section may not be present. So we will need to generate the negative voltage from outside.
In some GLCD displays, the segment and common drivers used will be made by different manufacturer, but they will be compatible with KS controllers. There are 8 pages in each half which is controlled by each KS controller. One page one row contains 64 columns of 8 rows.
Lab Interfacing a KS based Graphics LCD (Part 1) – Embedded Lab
Whenever we transfer the data, we first selects the half by CS bits, then page address X and then the Y address. The byte will be transferred as a 1 bit wide strip and will be stored in display RAM location. We can summarise this process as follows. We will be leaving first two columns, 8th column and last row of the page for spacing. Below image explains how the fonts are created in graphic LCDs. Ks1008 order to display this, we need to transfer following bytes to the first page of the display by selecting left controller CS1 in Y address from 0 to 7: The above table lists different instructions available for KS controller.
We will be discussing each kss0108 the instructions and implementation in the next part of this article. gllcd
To interface the graphical LCD, we need one 8-bit port and 6 other pins. We have used a 1K resistor to limit the current to the backlit LED. We will discuss the different instructions and firmware implementation in next part of this article.